Cita APA (7a ed.)

Allen, J. L. (2006). Opus Dei: The truth about its rituals, secrets and power. Penguin Books.

Cita Chicago Style (17a ed.)

Allen, John L. Opus Dei: The Truth About Its Rituals, Secrets and Power. London [etc.]: Penguin Books, 2006.

Cita MLA (9a ed.)

Allen, John L. Opus Dei: The Truth About Its Rituals, Secrets and Power. Penguin Books, 2006.